GENERAL ORGANIC+BIO...(LL)-W/MOD.ACCESS
3rd Edition
ISBN: 9780134466699
Author: FROST
Publisher: PEARSON
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Chapter 2, Problem 1IA.1Q
Summary Introduction
To determine:
The number of protons present in calcium-42 and calcium-40.
Introduction:
Proton is defined as the subatomic particle which is a positively charged species present in the nucleus of an atom. The atoms having same number of protons but different number of neutrons are known as isotopes.
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(a
4 shows scanning electron microscope (SEM) images of extruded
actions of packing bed for two capillary columns of different diameters,
al 750 (bottom image) and b) 30-μm-i.d. Both columns are packed with the
same stationary phase, spherical particles with 1-um diameter.
A) When the columns were prepared, the figure shows that the column with
the larger diameter has more packing irregularities. Explain this observation.
B) Predict what affect this should have on band broadening and discuss your
prediction using the van Deemter terms.
C) Does this figure support your explanations in application question 33?
Explain why or why not and make any changes in your answers in light of
this figure.
Figure 4 SEM images of
sections of packed columns
for a) 750 and b) 30-um-i.d.
capillary columns.³
fcrip
= ↓ bandwidth Il temp
32. What impact (increase, decrease, or no change) does each of the following conditions have on the individual
components of the van Deemter equation and consequently, band broadening?
Increase temperature
Longer column
Using a gas mobile phase
instead of liquid
Smaller particle stationary phase
Multiple Paths
Diffusion
Mass Transfer
34. Figure 3 shows Van Deemter plots for a solute molecule using different column inner diameters (i.d.).
A) Predict whether decreasing the column inner diameters increase or decrease bandwidth.
B) Predict which van Deemter equation coefficient (A, B, or C) has the greatest effect on increasing or
decreasing bandwidth as a function of i.d. and justify your answer.
Figure 3 Van Deemter plots for hydroquinone using different column inner diameters (i.d. in μm). The data was
obtained from liquid chromatography experiments using fused-silica capillary columns packed with 1.0-μm particles.
35
20
H(um)
큰 20
15
90
0+
1500
100
75
550
01
02
594
05
μ(cm/sec)
30
15
10
Chapter 2 Solutions
GENERAL ORGANIC+BIO...(LL)-W/MOD.ACCESS
Ch. 2 - Where are the subatomic particles located in an...Ch. 2 - Prob. 2.2PPCh. 2 - Prob. 2.3PPCh. 2 - Prob. 2.4PPCh. 2 - How can you determine the following? a. the number...Ch. 2 - What can be determined from the following? a. the...Ch. 2 - Provide the name and atomic symbol of the element...Ch. 2 - Provide the name and atomic symbol of the element...Ch. 2 - Prob. 2.9PPCh. 2 - Prob. 2.10PP
Ch. 2 - Determine the number of protons, neutrons, and...Ch. 2 - Determine the number of protons, neutrons, and...Ch. 2 - Prob. 2.13PPCh. 2 - Prob. 2.14PPCh. 2 - Prob. 2.15PPCh. 2 - Prob. 2.16PPCh. 2 - Prob. 2.17PPCh. 2 - How are atomic mass and mass number similar? How...Ch. 2 - There are three naturally occurring isotopes of...Ch. 2 - Prob. 2.20PPCh. 2 - Prob. 2.21PPCh. 2 - Prob. 2.22PPCh. 2 - Prob. 2.23PPCh. 2 - Prob. 2.24PPCh. 2 - Prob. 2.25PPCh. 2 - Prob. 2.26PPCh. 2 - Prob. 2.27PPCh. 2 - Prob. 2.28PPCh. 2 - Prob. 2.29PPCh. 2 - Prob. 2.30PPCh. 2 - Prob. 2.31PPCh. 2 - Prob. 2.32PPCh. 2 - What does the unit sievert measure?Ch. 2 - Prob. 2.34PPCh. 2 - Prob. 2.35PPCh. 2 - Prob. 2.36PPCh. 2 - Prob. 2.37PPCh. 2 - Prob. 2.38PPCh. 2 - Prob. 2.39PPCh. 2 - Prob. 2.40PPCh. 2 - Prob. 2.41PPCh. 2 - Prob. 2.42PPCh. 2 - Prob. 2.43PPCh. 2 - Prob. 2.44PPCh. 2 - Complete the following statements: a. A...Ch. 2 - Complete the following statements: a. The mass...Ch. 2 - Prob. 2.47APCh. 2 - Prob. 2.48APCh. 2 - Prob. 2.49APCh. 2 - Prob. 2.50APCh. 2 - Prob. 2.51APCh. 2 - Prob. 2.52APCh. 2 - Prob. 2.53APCh. 2 - Prob. 2.54APCh. 2 - Prob. 2.55APCh. 2 - Prob. 2.56APCh. 2 - Prob. 2.57APCh. 2 - Prob. 2.58APCh. 2 - Prob. 2.59APCh. 2 - Prob. 2.60APCh. 2 - Prob. 2.61APCh. 2 - Prob. 2.62APCh. 2 - Prob. 2.63APCh. 2 - Prob. 2.64APCh. 2 - Prob. 2.65APCh. 2 - Prob. 2.66APCh. 2 - Prob. 2.67APCh. 2 - Prob. 2.68APCh. 2 - A 25-mL sample of chromium-51 contains 1.00 mCi....Ch. 2 - Prob. 2.70APCh. 2 - Prob. 2.71APCh. 2 - Prob. 2.72APCh. 2 - Prob. 2.73APCh. 2 - Prob. 2.74APCh. 2 - Prob. 2.75APCh. 2 - Prob. 2.76APCh. 2 - Prob. 2.77CPCh. 2 - Prob. 2.78CPCh. 2 - PET scans are useful for imaging areas of high...Ch. 2 - Prob. 1IA.1QCh. 2 - Prob. 1IA.2QCh. 2 - Prob. 1IA.3QCh. 2 - Prob. 1IA.4QCh. 2 - Prob. 1IA.5QCh. 2 - Prob. 1IA.6QCh. 2 - Prob. 1IA.7QCh. 2 - Prob. 1IA.8QCh. 2 - Prob. 1IA.9QCh. 2 - Prob. 1IA.10QCh. 2 - Prob. 1IA.11QCh. 2 - Prob. 2IA.1QCh. 2 - Prob. 2IA.2QCh. 2 - Prob. 2IA.3QCh. 2 - Prob. 2IA.4QCh. 2 - Prob. 1ICCh. 2 - Prob. 2IC
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